Why do you wear 3D glasses when watching a 3D movie and the pictures in the movie will appear as if they are real?

3D movies are usually shot simultaneously from two different directions with two lenses, and then during the projection, the two sets of films captured by the two cameras are simultaneously projected through two projectors, and The two slightly different images overlap on the screen. Wearing glasses will give you a 3D effect. True online 3D is to transmit 3D source data to users using online technology. If the user has a 3D display device, such as a 3D monitor, 3D projector, 3D TV, etc., the user can directly use the 3D display device to view the data online. The 3D function converts the 3D data into 3D images to achieve 3D effects; if the user does not have a 3D display device, the user can also use the client to convert the 3D data into a color-difference 3D image in real time, and use red and blue glasses to view it.

You can also feel the 3D effect, but the effect is slightly worse